K5TRA 144, 432, 902, 1296 and 2304 Station
K5TRA 222 MHz and 10 GHz Station
K5TRA 50 MHz Station (also HF)
WEAK SIGNAL OPERATION
The World Above 50 MHz - Austin Summerfest 2015 (RMG Forum)
Fun with Roving - Austin Summerfest 2015 (RMG Forum)
2023 W6JKV - K5AND 6m BBQ -- The LAST one!
TechTalk presentation slides -- downloadable PDF
World Above 50 Mhz and HC8 on 6 Meters - Jon Jones, N0JK
3Y0J Bovet Island - Mike Crownover Jr, AB5EB
Open Conversation with K1JT - Joe Taylor, K1JT
Cycle 25 and 6m Propagation Topics - Carl Luetzelschwab – K9LA
DXPeditions and FT8 Mode - Lance Collister, W7GJ
EME on the Microwave Bands - Al Ward, W5LUA
Coax, Connectors and Waterproofing - Hector Garcia, XE2K
TechTalk slides not presented due to time-- downloadable PDF
K4 VHF-UHF transverter station interface - Dick Hanson, K5AND
50 MHz preamp with internal filters - Tom Apel, K5TRA
K5TRA ANTENNAS
Linear Arrays - K5TRA (RMG TechTalk)
6M Phase Steerable 2x2 Endfire Array - K5TRA - RMG & NTMS meeting 2018 (Belton)
Circular Collinear Omnidirectional Array - K5TRA - revised 2023
Helical Collinear Omnidirectional Array - QEX 2011 Nov/Dec
Offset dish feed calculations - K5TRA analysis
Antenna Farm - K5TRA [2024] attic antennas & remote amplifiers
Antenna Farm video - Video tour of K5TRA [2020] attic antennas & remote amplifiers (ZIP of mp4)
Video tour of K5TRA attic antennas & remote amplifiers
TRANSVERTERS
10 GHz - Austin Summerfest 2016 (RMG Forum)
2304 MHz - RMG meeting 2016 (Bee Cave)
1296 MHz - Old 2010 transverter
1296 MHz - New 2020 transverter
902 MHz - Old 2010 transverter
902 MHz - New 2020 transverter
222 MHz - 2011 transverter
BEACONS
10368 MHz Beacon - Roadrunners Microwave Group
5760 MHz Beacon - Roadrunners Microwave Group
1296 MHz Beacon - Roadrunners Microwave Group
144, 432, and 902 MHz Beacons - Roadrunners Microwave Group
50 MHz Beacon ver.2 - Roadrunners Microwave Group
50 MHz Beacon - Guadalupe Valley Radio Club
222 MHz Beacon - K5TRA: This was the prototype for the other bands thru 23 CM
DESIGN
Microstrip PA Design - Part I - MRF284 30W 1296 MHz PA design example
Board Level Impedance Matching - Smith Chart 1296 MHz design example
Broadband Impedance Matching - Synthesis techniques with examples
Broadband Transformers - Ruthroff original paper
Transmission-Line Transformers - Ruthroff, Guanella, etc.
Quadrature (90°) Hybrids - input match like magic
Noise Figure - "cool" stuff
TECH LIBRARY - Many more technical papers on all facets of design
DESIGN AID SOFTWARE - Downloadable applets for RF design by K5TRA
HOMEBREW
6m freq.programmable beacon - Homebrew project
6m LDMOS FET 20W PA - Homebrew project
Some new project boards - Homebrew projects
23cm & 33cm filter and driver board test results - Homebrew projects
Programmable LO module - 10 MHz to 1.62 GHz - Homebrew project
Remote link for SSB transceiver - Homebrew project
50 MHz LNA with internal filtering - Homebrew project
K4 interface for transverters, PAs and antenna switching - Homebrew project
Remote PA Power Telemetry Over Ethernet - Homebrew project
Active Speaker Combiner for Mobile Radio Consolidation - Homebrew project
222 MHz Harris PA - Homebrew project
RF Keyed DC Sequencer - Homebrew project
VHF-UHF Remote Low Noise & Power Amplifiers - Homebrew project
902 & 1296 MHz Mitsubishi Power Amplifiers - Homebrew project
902 & 1296 MHz Low Noise Preamps - Homebrew project
902 & 1296 MHz Remote LNAs - Homebrew project
902 & 1296 MHz Remote PA & LNAs - Homebrew project
1296 MHz Remote PA & LNA - Homebrew project
1296 MHz PreDriver (+31 dBm) - Homebrew project
Panadapter Interface for Three Transceivers - Homebrew project
10 GHz PA Design - Homebrew project (design)
10 GHz PA Results - Homebrew project (part-II)
10 GHz LNA - Homebrew project
10 GHz PA & LNA Construction Tips - Homebrew project (part-III)
TDR Adapter for Oscilloscope - Homebrew project